Preparation of red mud-based catalyst and performance for trace ammonia in simulative tail gas

Chao WANG; Changming LI; Lin HUANGFU; Ping LI; Yunquan YANG; Shiqiu GAO; Jian YU; Guangwen XU

doi:10.11949/j.issn.0438-1157.20181051

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Preparation of red mud-based catalyst and performance for trace ammonia in simulative tail gas

Energy and environmental engineering | 更新时间：2026-07-24

- Preparation of red mud-based catalyst and performance for trace ammonia in simulative tail gas
- CIESC Journal Vol. 70, Issue 3, Pages: 1056-1064(2019)
- 作者机构：
  
  1.湘潭大学化工学院，湖南湘潭 411105
  2.中国科学院过程工程研究所多相复杂系统国家重点实验室，北京 100190
  3.沈阳化工大学，辽宁沈阳 110142
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181051
  CLC： TQ 426.6
- Received：19 September 2018，
  
  Revised：2018-12-11，
  
  Online First：24 July 2026，
  
  Published：05 March 2019
- 稿件说明：
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王超, 李长明, 皇甫林, 李萍, 杨运泉, 高士秋, 余剑, 许光文. 赤泥催化剂的制备及其对模拟烟气中微量氨的脱除性能[J]. 化工学报, 2019, 70(3): 1056-1064

WANG Chao, LI Changming, HUANGFU Lin, LI Ping, YANG Yunquan, GAO Shiqiu, YU Jian, XU Guangwen. Preparation of red mud-based catalyst and performance for trace ammonia in simulative tail gas[J]. CIESC Journal, 2019, 70(3): 1056-1064
王超, 李长明, 皇甫林, 李萍, 杨运泉, 高士秋, 余剑, 许光文. 赤泥催化剂的制备及其对模拟烟气中微量氨的脱除性能[J]. 化工学报, 2019, 70(3): 1056-1064 DOI： 10.11949/j.issn.0438-1157.20181051.

WANG Chao, LI Changming, HUANGFU Lin, LI Ping, YANG Yunquan, GAO Shiqiu, YU Jian, XU Guangwen. Preparation of red mud-based catalyst and performance for trace ammonia in simulative tail gas[J]. CIESC Journal, 2019, 70(3): 1056-1064 DOI： 10.11949/j.issn.0438-1157.20181051.

摘要

以赤泥固废为原料，采用酸解-碱沉淀法制备了赤泥粉体催化剂，并提出一种将催化剂直接喷入SNCR尾气中的除氨工艺，考察了催化剂加入点温度、空速、NH

浓度及水蒸气对氨去除能力的影响。研究发现，该催化过程具有很高的活性和N

的选择性，450℃以上NH

的转化率可达100%，同时在400～500℃间，N

的选择性高于80%，达到了很好的除氨效果；在500℃，空速为3×10

~6×10

-1

之间时，出口NH

浓度均为0；此工艺对于逃逸NH

浓度的适用性较强，入口[NH

]

= 50×10

-6

~1000×10

-6

mol/L范围内均可完全脱除，且具有一定的抗水能力。通过一系列表征发现，该种方法制备的赤泥催化剂不仅消除了原始固废的强碱性，还提高了其表面酸性，具有较高的比表面积、孔容和丰富的表面微观结构，使NH

的吸附及活化反应能力大大增加；该催化剂过程遵循iSCR机理，在400～500℃温度区间主要发生NH

-SCO反应，低于400℃主要发生NH

-SCR反应，粉体催化剂通过NH

-SCR和NH

-SCO协同反应达到了去除尾气中微量氨的目的。

Abstract

A Fe-based powder catalyst was prepared from red mud (RM) solid waste with acid base neutralization method

which was used to eliminate the trace ammonia thought the proposed process of directly spraying the catalyst into SNCR tail gas. The effects of temperature

space velocity

concentration and water vapor on ammonia removal capacity of the catalyst were investigated in details

and excellent removal efficiency could be achieved with 100% NH

conversion above 450℃ as well as

80% selectivity of N

between 400—500℃. Especially

the trace ammonia in the tail gas can completely be cleared with 0 left between the space velocity of 3×10

—6×10

-1

at 500℃. Meanwhile

the catalytic process is also effective for the removal of NH

with wide concentration of (40×10

-6

~800×10

-6

mol/L) even in the presence of water. The multiple characterizations further revealed that the strong alkalinity of the original solid waste was removed together with the increase of surface acidity as well as large specific surface area and rich surface microstru

cture for the obtained red mud catalyst

which accounts for its significant increase of adsorption and activation of NH

. Moreover

it was found the removal process of NH

follows the internal selective catalytic reduction (iSCR) mechanism

and the NH

was eliminated through both the NH

-SCR and NH

-SCO reactions

which mainly function below 400℃ and between 400-500℃

respectively.

关键词

Keywords

references

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